JPS56146169A - Control device for releasing fixing pressure - Google Patents

Control device for releasing fixing pressure

Info

Publication number
JPS56146169A
JPS56146169A JP5009580A JP5009580A JPS56146169A JP S56146169 A JPS56146169 A JP S56146169A JP 5009580 A JP5009580 A JP 5009580A JP 5009580 A JP5009580 A JP 5009580A JP S56146169 A JPS56146169 A JP S56146169A
Authority
JP
Japan
Prior art keywords
output
gate
rises
abnormality
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP5009580A
Other languages
Japanese (ja)
Inventor
Akio Katsumata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP5009580A priority Critical patent/JPS56146169A/en
Publication of JPS56146169A publication Critical patent/JPS56146169A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
    • G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
    • G03G15/2017—Structural details of the fixing unit in general, e.g. cooling means, heat shielding means
    • G03G15/2032—Retractable heating or pressure unit
    • G03G15/2035—Retractable heating or pressure unit for maintenance purposes, e.g. for removing a jammed sheet

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)

Abstract

PURPOSE:To prevent the deformation of a fixing roller and facilitate the removal of jammed paper by releasing the pressure upon the fixing rollers upon occurrence of abnormality such as paper jamp. CONSTITUTION:At the normal time, the jam signal from a jam detecting means and the abnormality signal from an abnormality detecting means are L, the output of an OR gate OR 1 is L, the output of an AND gate AND 1 is L and the output of a timer T is L. At this time, the output of an inverter IV 1 is H and therefore if the motor driving signal from a sequence control part rises to H, the output of an AND gate AND 2 rises to H, the output of an OR gate OR 2 rises to H, a transistor TR1 turns to ON, mechanical driving is accomplished, an AND gate 3 rises to H, and pressure is exerted upon fixing rollers 8, 9. On the other hand, in the case of abnormality in which there is no transfer paper in the place of the rollers 8, 9, at least one of the abnormality signal and the jam signal rises to H, the TR1 turns to OFF and the machine stops.
JP5009580A 1980-04-15 1980-04-15 Control device for releasing fixing pressure Pending JPS56146169A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5009580A JPS56146169A (en) 1980-04-15 1980-04-15 Control device for releasing fixing pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5009580A JPS56146169A (en) 1980-04-15 1980-04-15 Control device for releasing fixing pressure

Publications (1)

Publication Number Publication Date
JPS56146169A true JPS56146169A (en) 1981-11-13

Family

ID=12849492

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5009580A Pending JPS56146169A (en) 1980-04-15 1980-04-15 Control device for releasing fixing pressure

Country Status (1)

Country Link
JP (1) JPS56146169A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013186266A (en) * 2012-03-07 2013-09-19 Ricoh Co Ltd Fixing device and image forming apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5347839A (en) * 1976-10-13 1978-04-28 Toshiba Corp Fixing device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5347839A (en) * 1976-10-13 1978-04-28 Toshiba Corp Fixing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013186266A (en) * 2012-03-07 2013-09-19 Ricoh Co Ltd Fixing device and image forming apparatus

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